Tens of millions of workers contribute to 401(k)s, thanks to a benefits consultant who got creative with a 1978 law. That consultant, Ted Benna, joins us to talk about how he came up with the idea, how he got Uncle Sam’s seal of approval, and the ways that Wall Street have abused the 401(k). He also discusses his new book, “401(k)s and IRAs for Dummies,” including why he thinks Roths are over-sold and his recommendations for retirement plans for small business and the self-employed.